Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of Ignition Location on a Vented Deflagration of Hydrogen-air Mixtures in Semi-confined Space

반밀폐공간 내 점화원의 위치가 수소-공기 혼합물 벤트폭연에 미치는 영향

  • UNGGI YOON (Department of Fire Safety Research, Korea Institute of Civil Engineering and Building Technology) ;
  • BYOUNGJIK PARK (Department of Fire Safety Research, Korea Institute of Civil Engineering and Building Technology) ;
  • INJU HWANG (Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology) ;
  • WOOKYUNG KIM (Department of Mechanical Systems Engineering, Hiroshima University) ;
  • YANGKYUNG KIM (Department of Fire Safety Research, Korea Institute of Civil Engineering and Building Technology)
  • 윤웅기 (한국건설기술연구원 화재안전연구소) ;
  • 박병직 (한국건설기술연구원 화재안전연구소) ;
  • 황인주 (한국건설기술연구원 환경연구본부) ;
  • 김우경 (히로시마대학 기계시스템공학과) ;
  • 김양균 (한국건설기술연구원 화재안전연구소)
  • Received : 2024.07.19
  • Accepted : 2024.08.21
  • Published : 2024.08.30
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Abstract

Explosion experiments were conducted using a rectangular concrete structure filled with hydrogen-air mixture (29.0%). In addition, the effect of ignition location on explosion was investigated. The impact on overpressure and flame was increased with the increasing distance of the ignition source from the vent. Importantly, depending on the ignition location the incident pressure was up to 24.4 times higher, while the reflected pressure was 8.7 times higher. Additionally, a maximum external overpressure of 30.01 kPa was measured at a distance of 2.4 m from the vent, predicting damage to humans at the injury level (1% fatality probability). Whereas, no significant damage would occur at a distance of 7.4 m or more from the vent.

Keywords

Acknowledgement

본 연구는 과학기술정보통신부 한국건설기술연구원 연구운영지원비지원사업으로 수행되었습니다(과제 번호 20240176-001, 수소도시 기반시설의 안전 및 수용성 확보기술 개발).

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